JPS6152911A - 1-stand 3-pass multi-stage rolling mill - Google Patents

Abstract

PURPOSE:To improve the shape and quality of a strip at high rolling reduction by making at least one side of outside work rolls small diameter, and at the same time, by adding reinforcement of multi-stage cluster type to the work rolls. CONSTITUTION:Work rolls 1, 4 are reinforced by making outside work rolls 1, 4 small diameter work rolls, and arranging intermediate rolls 5, center back up bearings 6 and side back-up bearings 7 in cluster type. By this mechanism, rolling can be made at high rolling force in the state that the strip 8 is wound on the large diameter work rolls 2, 3 half round each. Further, the shape control of the strip 8 becomes easy by adjusting eccentricity of the back-up bearing 7 etc. Accordingly, a strip 8 improved in the shape and quality is obtained at relatively high rolling reduction by this method.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention is a technology that belongs to the industrial field for rolling metal strips, especially copper strip B, and the disclosure content of this specification also applies to rolling of metal strips, especially copper strips B. In addition, this is a proposal for an improved technique related to one-stand three-pass rolling suitable for obtaining a strip with a good shape.

(Conventional technology) General copper strip (hereinafter referred to as monomer IJ tube)
Cold rolling equipment consists of several rolling mills arranged in tandem, and although it has great merits and results, it has the drawback of high equipment and maintenance costs.
There are also constraints in terms of factory space, and multiple arrays are often undesirable.

For example, in rolling where the total reduction ratio exceeds 80%, 6
If it is a corrugated rolling mill, at least 4 stands are required.
Also, if it is a 4-high rolling mill, at least 5 stands are required.

Based on such background technology, conventionally, Japanese Patent Application Laid-Open No. 56-171
A technique has been proposed in which high pressure rolling is performed using an l-stand as disclosed in No. 06.

FIG. 6 shows a typical example of such prior art.

In the drawings, 21.22G:t are work rolls, 2 and 3.24G:t are backup rolls, 25.26 are tension pry rolls, and S is a strip.

As shown in this figure, the strip S in the prior art is between the backup roll 24 and the work roll 22;
Work roll 22.21 between each other and work roll 2
1 and a backup roll 23 to perform three passes of rolling.

(Problems to be Solved by the Invention) However, in the conventional rolling technique shown in FIG. However, there was a problem in that it was difficult to obtain a strip with a good shape (differences in properties between the front and back surfaces and warping) under so-called high reduction rolling.

An object of the present invention is to propose a novel multi-stage rolling means that can solve the above-mentioned problems.

(Means for Solving the Problems) In order to overcome the above-mentioned problems of the known 1-stand 8-pass rolling technology, the present invention provides a rolling method for bulk, cup rolls or bearings. A one-stand 8-pass multi-stage rolling system in which four vertically arranged work rolls are provided and each work roll is reinforced by a roller, and a rolling pass is formed between each of the adjacent work rolls. A one-stand three-pass multi-high rolling mill characterized in that at least one of the outer sides of the work rolls is a small-diameter work roll, and the small-diameter work roll is reinforced in the form of a multi-stage cluster. By adopting
We set out to solve this problem.

(Function) FIG. 4 shows the relationship between rolling load and rolling rate for the rolling mill of the present invention and the conventional rolling mill. In this figure, the curve (A
) is an example of a conventional general 4-high rolling mill or a 6-high rolling mill, and the illustrated curve (A') is an example of a Sendzimir rolling mill (20-high cluster rolling mill)? The one shown and shown by curve (B) is an example of a conventional one-stand three-pass rolling mill,
And song I! (0,) is an example of a one-stand three-pass rolling mill of the present invention. For example, when rolling with a rolling reduction of 40%, the rolling mill of the present invention only requires a rolling reduction of 600 to 9;
In the example of the Sendzimir rolling mill, 1500 Ie9 is required, and this difference enables high reduction rolling without deteriorating the shape of the strip in the present invention.

(Example) FIG. 1(al) and (b) show IWs of typical roll configurations of the present invention, which will be specifically explained below with reference to the drawings.The present invention shown in this figure The 1-stand 14-stage 8-pass rolling mill has four work rolls 1.2.8.4 vertically arranged in multiple stages, two rows each on top and bottom - a total of four intermediate rolls 5, and two The center backup bearings 6, 6, 2 rows each on the upper and lower sides, and a total of 4 side backup bearings 7 are arranged in a cluster format.

The adjacent work rolls 1, 2, 2, 3, and 8 and 4 each form a rolling bath.

This results in the strip 8) being rolled 23 times, that is, the strip is passed around each of the inner large-diameter work rolls 2.3 for half a turn, so that 8 passes of rolling are achieved in 1 stand, and a strong pressure is achieved. The bottom becomes possible. In addition, 9 of illustration is a deflector roll.

It should be noted that if the outer work roll 1.4 is thus provided with a multi-stage cluster type reinforcement composed of the intermediate four-wheel 5 and the backup bearing 6.7, it is possible to Although not disclosed as an example of a multi-high rolling mill, since the shape of the strip 8 can be easily controlled by an eccentricity adjustment mechanism (not shown) of the backup bearing 7, etc., a relatively high rolling reduction rate (for example, 60 to 70%) can be achieved. It is certain that it is possible to roll a strip with an excellent shape even under ), and the same effect is achieved even in the case of the one-stand eight-pass rolling mill of the present invention.

FIGS. 2(a) and 2(b) are configuration diagrams of a rolling mill roll arrangement according to another embodiment of the present invention. Components common to those in FIG. 1 are designated by the same reference numerals. The feature of this example is that the small-diameter work roll 1 is arranged only on the upper side, and the backup is performed only for this upper small-diameter backup roll - two intermediate rolls and one center backup bearing 6.2 This type is reinforced with a side backup bearing 7.
Unlike the illustrated example, this is an example of a 10-high rolling mill in which the outer lower work roll is a large-diameter work roll 10. In this type, as in the first illustrated example, it is possible to control the shape of the IJ tube and to apply a strong rolling reduction.

The eighth illustrated example roughly shows the application number of the present invention, and is a one-stand 8-pass 22-high rolling mill suitable for forming ultra-thin metal strips. invention 2
Book small diameter work roll 1゜4.2 intermediate rolls 5,5
．． This technology is applied to a multi-stage cluster type rolling mill and a single-stand three-pass rolling mill, which is composed of three second intermediate rollers 12, four back amplifier bearings 13, and so on.

(Effects of the Invention) As explained above, according to the present invention, the work roll is not deformed even when the rolling force is increased, and even under such a relatively high rolling reduction rate, a strip with an excellent shape can be rolled. It has the advantage that it can be easily manufactured.

[Brief explanation of the drawing]

Figures 1-(al and b) are a front view (a), a side view (b), and Figure 2-(a), ( b) is a front view showing an example of a 1-stand 10-high 3-pass rolling mill of the present invention, and a side view (BL), and Figure 8 is a front view of a 22-high 3-pass rolling mill showing an application example of the present invention. Fig. 4 is a comparison graph of the present invention and the conventional method of the relationship between rolling load and reduction ratio.
The figure is a front view of a conventional one-stand three-pass rolling mill. 1.4...Small diameter work roll 2.3...Large diameter work roll 5...Intermediate roll 6...Center backup bearing 7...Side backup bearing 8...Strip
9...Deflector roll 10...Intermediate roll
11... Backup roll 12... Second intermediate roll 18... Backup bearing.

Claims (1)

[Claims] 1. Provide backup rolls or four work rolls in a vertical arrangement reinforced through bearings,
For a one-stand three-pass multi-high rolling mill configured so that rolling passes are formed between adjacent work rolls, at least one of the outer sides of the work rolls is a small-diameter work roll, and This 1-stand 3-pass multi-stage rolling mill is characterized by adding reinforcement in the form of multi-stage clusters to the small-diameter work rolls.